OHKO moves and the focus sash

Question

example:
lapras VS pidgeot(both lvl100)
pidgeot is holding the focus sash
lapras uses SHEER COLD(yea not persh song, i think origional ;)
senario 1:
it was a One Hit KO

senario 2:
pidgeot held on thanks to the focus sash

what senario would take place?

Answer 1

Pidgeot held on thanks to the Focus-sash.

Source: Personal experience.